How the Thermostatic AC Expansion Valve Works aka TXV,TEV and TX

[@stansburygreg]

Very good explanation! I just replaced one on my old Durango and was curious about how they worked and now I know! Thanks!

[@jonganzer7478]

Very helpful, thank you for taking time to put this all together and help a lot of folks out.

[@sal92copride86]

Thank you very much for such a clear and informative explanation/demonstration video of how the pin operates within the expansion valve block. I was unaware and wasn't sure if the pin going inward or outward closed/opened the flow. My initial guess was exactly as stated here but it definitely instills additional confidence now that it's been verified through your video. Thank you very much I will continue to skim through your channel for more videos like this. After watching this I'm a fan of your organization/thoroughness with your presentation/s and have to subscribe. Have a blessed day brother!

[@bbkmm1]

This channel deserves more views and subs. Only a few channels on YT that goes into theory and diagnostics.

[@edwardjayfix]

Great explanation!! Best I seen yet!

[@jorbitz69]

Very informative and well explained. Thanks for sharing your expertise and experience!!!

[@FilterYT]

Awesome series, thanks again!

[@DylanRabier]

Very well explained 👍

[@garyrichardson2915]

Expansion is the key word. For those with no knowledge of how a refrigerant system does what it does this may help. In the circuit as the compressor pumps the Freon around and around it goes through a repeated change from hot gas to hot liquid to the expansion valve, or metering device, as it leaves the txt it expands. When it expands it absorbs all the heat from around it which resulting in everything around it becoming cold. Sounds crazy but it’s true. As it passes through the evaporative coil under the dash the air passing through becomes cold. It then leaves the evap. coil as a cold gas back to the compressor where it is compressed back to a hot gas to begin it’s next trip. Contrary to what some believe, Freon does not wear out ever! If the systems components function properly, the ac system can only be affected by outside elements such as, restricted air flow, intense humidity, plugged drain lines, and dirt and hair. I will give you one for instance. You are or someone who rides with you smokes and rides with the windows cracked too often and you run your as on recirculate which allows outside contaminates enter the cab and it goes straight to the coil. We have a lot of Cottonwood trees in the south. I have cleaned a coil then get called back because it became restricted overnight. Keep your coils clean. Inside and outside.

[@iamoutofideas13]

Well this was awesome. Subbed.

[@tallguyjosh]

Thank you for you explanation. I have two questions. My old block type TXV had a strip of butyl tape wrapped up over the sensing bulb. The new valve does not come with this butyl tape installed. 1)Is this insulating tape necessary? 2)Would installing extra insulating butyl over the sensing bulb cause the TXV to not function properly?

[@mustyali9529]

Can you remove the TXV and clean it for reuse?

[@jwlivingston1]

thank you can you test this by cooling with ice and hair dryer

[@kembaralama6850]

👍👍👍

[@grupinfractionalorganizatp5003]

hi -I don't understand for that model thermal expansion valve-when the valve are close the orifice -the presure wrere are going ? many thanks where I can find a animation of this ?

[@ktmracer2365]

The high side pressure will increases when the txv valve is closed, and the low side will decrease. If the txv valve stays closed the pressure will increase too high or drop to low and either the low side switch or high side switch will turn the compressor off

[@leeang16]

could this be the reason why my car loses cold air when i go faster than 40mph